Indicator for the pitch and roll of vessels.



no. 683,788. Patented Oct. i, 190i.

W. F. E. NENEEMANN. INDiC ATGR FUR THE PiTfii-f AND BULL 0F VESSELS.

. (A'pplicafiion filed. Dec. 17, 1900.) (No Modei.) 2 Sheets-Sheec L WITNESSES Improvements in Indicators for the Pitch and suddenly or vibrate too easily.

' the indicator.

. from one set to face D of the casing are marked graduations aft or athwartships, and thus indicate either graduations should UNITED STATES PATENT OFFIE.

-WILLIAM F. O. NINDEMANN, OF NEW YORK, N. Y.

INDICATORFOR THE PITCH AND ROLL OF VESSELS.

SPECIFICATION forming part of Letters Patent No. 683,788, dated October 1, 1901. Application filed December 17,1900. Serial No. 40,118. (No model.)

may be read from eitherend of the hand. For ordinary vessels there may be also a set of graduations at' the top of the dial, when the hand can be set at right angles to the position shown in Fig. 1; but for submarine beats the arrangement of the hand as shown in Fig. 1 is preferred.

- In order to steady the pendulum in its movements and prevent it from vibrating too easily, there is a receptacle R mounted in the casing C, in which receptacle the pendulum hangs, hol, in which the pendulum is submerged. As the latter (see Fig.2) is nearly as wide as the receptacle, the liquid will check vibrations of the pendulum and steady it in its movements. The receptacle R is charged with alcohol at a filling-tube -t and may be drawn ofi at an outlet-tube i.

In order that the pendulum may swingfreely, even when the instrumentis inclined,- the' stem of the pendulum is provided with a sleeve 8, which embraces and is secured to the arbor a and fits snugly endwise in the re'-' vceptacle R.

Alcohol is used tacle R, but any liquid may .as well be em ployed. Alcohol will not freeze, but other liquids or mixtures of liquids will also stand' low temperatures without freezing.

In Fig. 3 the indicator is represented (I in this figure) as mounted in a vessel V on a transverse. bulkhead '1, also seen in Fig. 1. The bracket .B may be secured tothis bulkhead or partition by screws or other means.

Having thus described my invention, I claim-- 1. An indicator for the pitch .and roll of a vessel, comprisinga bracket to be mounted in the vessel and having two projecting arms, a dial and its casing pivotally mounted at top and bottom in the arms of said bracket To all whom it may concern.-

Be it known that 1, WILLIAM F. O. NINDE- MANN, a citizen of the United States, residing in the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented'oertain new and useful Roll of Vessels, of which the following is a specification.

This invention relates to the class of pendulum devices for indicating the degree of inclination ofa vessel when itpitches or rolls; and the object is, in part, to provide a simple device which will indicate both the pitch, or longitudinal inclination, and the roll, or lateral inclination, and in part toprovide -a siniple means for steadying the pendulum in its movement, so that it may not shift too In the accompanying drawings,which serve to illustrate an embodiment of the invention, Figure l isa face view of the indicator, partly broken away to show the interior. Fig. 2 is a transverse vertical section at line 2 in Fig. 1; and Fig. 3 is a cross-section, on a relatively small scale, of 'a vessel provided with The indicator comprises a dial-casing O, which may be conveniently of circular form, although this is not essential. On the dial- G, indicating degrees, and on an arbor a, extending through the casing, is secured a hand it. On the arbor a, withinthe casing, is socured a pendulum P. (Seen only in dotted lines in Fig. 1'.) The casing has pivots p at top and bottom, whereby it is mounted in a suitable bracket B, so that the casing maybe turnedwith the hand It extending fore and the pitch or roll of the vessel. In mounting the indicator in the vessel a line passing through the two pivots 1) must be perpendicular with the water-line plane, and then the hand 71. will point to zero on the graduations Gwhen the v'esselis on an even keel. The number from zero in both directions, as shown, and preferably there will be a series of graduations at opposite edges of the dial, the hand extending across the other; but this is only a that the degree of inclination the vessel is on an even keel, an arbor in said casing, the hand thereon adapted to traverse graduations on the dial, a receptacle for liquid in said casing, and the pendulum fixed to the arbor and suspended in said receptacle, substantially as set forth.

dicator for the pitch and roll of the vessel, said indicator comprising convenience, so

and this receptacle contains alco-' so that its pivotal axis. may be vertical when 2. The combination with a vessel, of an inby preference in the recep 7 a dial-casing pivonly in said bracket and having, a dial with degree-gradnations thereon, an

l l l C, pivotally mounted at its topv arbor u. in the casing, a receptacle It for liquid, and a pendulum secured to said arbor and pendent in said-re- 15 cep'tacle, substantially as set forth.

a hand /lon said arbor,

In witness whereof I have hereunto signed my name, this 14th day of December, 1900, in the presence of two subscribing witnesses.

WILLIAM F. (J. NINDEMANN. Witnesses:

HENRY CONNETI', ln'rnn A. Ross. 

